Electrically-operated clock.



PATENTED APR. 28, 1908.

D. SANDRBTTO. ELEOTRICALLY OPERATED CLOCK.

APPLIOATIOH FILED NOV. 21. 1907.

m 2 Z 2% aw DOMINIC SANDRETTO, O'F LADD, ILLINOIS. 4

ELECTRICALLY-OPERATED CLOCK.

Specification of Letters Patent.

Patented April 2a, 1908.

Application filed November 21, 1907. Serial'No. 403,149. c

To all whom it may concern.-

Be it known that'I, DOMINIC SANimn'rTo, a citizen of the United'States of America, and a resident of Ladd, county of Bureau, and State of Illinois, have invented certain new and useful Improvements in Electrically- Operated Clocks, of which the following is a specification.

My invention relates to electric clocksand particularly to an attachment forordinary clocks whereby they ma be transformedinto electrically operated c ocks.

The object of my invention is toprovide an attachment for ordinary clocks by means of which they may be transformed into electrically operated c ocks after having removed the main spring and wheel.

' A further object of my invention is to pr,o'

vide a device as mentioned, of few parts, of simple construction-and one which ma be readily and quickly attached to the 0100 by almost any one, and that without any change whatever in the worksof the clock except the removal of the main spring and'wheel.

Other objects will appear hereinafter.

My invention will he more readily understood by reference tothe accompanying drawings forming a part of this specification and in which, 3 a

Figure 1 is an elevation of an electric attachment for clocks embodying my invention in its referred form, Fig. 2 is a similar view with t e o. crating parts shown in a different o'sition, igL- 3 is-a plan viewthere'of, and ig.4isadetail. c

Referring to the drawi s, 1 indicates a plate forming the frame of t e deviceand by which it is secured within the clock-casing as by the screws, 2. Secured to theplate',11,. are a pair of electro-magnets, '3 beneath'the poles; 4 of which are pivotally mounted the ars, 5 and 6. The bar, 6 is-somewha't longer than the bar, 5 ,and to its outer end is pivot-- ally connected a.vertically disposed rod, 7 having a suitable device at its up er end for engagl the teeth of one of the w eelsof the clock.

hiscomprises the loo 8 Pi otally connected to the upper end oft e rod, 7 and held in engagement with a wheel of the clock" b'yas ring, 9-. Y -In igs. 1 and 2 of: the drawings, I have illustrated a portion of a clock frame andone of the wheels" 10 indicating the frame and 10 the wheel. lniorder' to;profperly ad'ust the loop, .8; to the-wheel, 10, a ter the device is secured within the cl'ocklcase, I make the rod,

- within the clock case, twosma moun'ted' u plate, 1.

7 adjustable. To this end, the rod is formedin two arts or sections 7 7 and to the upper en of the part 7 is secured a sleeve, 11, 1nto which the lower'end of the part 7 is slidably fixed. I

12 is a set screw for securing the parts against relative movement after having. been adjusted.

13 indicates a guide for the rod, 7, the same being secured to the plate, 1.-

1 and 1 l are binding posts b which the device is connected to a battery not shown).v

For convenience the battery may be arra ed dry cells eing suflicient. The post 1 is connected by a wire 1 to the magnet and by the other post p the op o'site pole of the battery is connected to the ame 1 of the device. When the magnet is deenergized the bars 5 and 6 drop by. gravity. The bar 5 drops quickly an its movement is limited by a pin or stop 5. The bar 6 dro s slowly and as it drops, it turns the whee 10 causing the clock to. run. It is obvious that the downward movement of thebar 6, to operate the clock must be limited, hence, I provide means for quickly raising it as soon as it reaches a certain predetermined position in its downward travel.

To this end I provide means for energizing the magnet, 3, at the proper time to raise the I cuit to themagnet to be closed. It is then immediately drawn up andas it reaches upper limit of movement it causes the circuit to be broken.- The bar 5- merely assists ir.

raising the bar; 6 the latter being of greater weight and passing further from the oles of the magnet,.i t-is not so readily raise as, the lighter one. When the magnet is energized the bar 5 is quickly raised .andvin raising, it

engages a pin. or'arm, 14,011 the bar, 6 thus assisting in raising the bar, 6, and bringing it further'into thejmagnetic field; Y

' The means for mak'ng and breaking the circuitthrough the'magnet will now be described, I15 indicates a lever pivot'ally on a'stud, 16 extending from the pen the end of the lever, 15flis a contactpiece, 17 which at the proper time en ga es witha contact 18 mounted upon but in s ated from the plate, 1. The contact 18 is connected to the magnet by a wire- 19. Pivotally mounted as at 20 upon the plate,

beneath the plane of the bars 5 and 6 isa lever, 21. This is normally held in raised p0- sition by a s ring, 22, its upward movement being limite byastop, 23. Extending laterally from the lever, 2 1 is pin, 24, which extends beyond the lower end, 25 of the lever, 15 into the path of the bar, 6. When the lever 21 is in raised position, as shown in Fig. 1 the end of the lever 25 rests against it olding the contact, 17 out of engagement withthe contact, 18. As the bar, 6 reaches its lower limit of movement it engages the pin, 24, de-' pressing the lever, 21 against the tension of the spring, 22. This moves the pin, 24, beyond the lower end-Z-of the lever, 15, permitting the contact, 17 to engage with the contact, 18, a spring, 15 serving to throw the lever. This closesthe circuit energizing the magnet, 3. As soon as the magnet is energized, the bar, 5 is quickly raised until it engages the arm, 14, at which time it is further into the magnetic field than the bar, 6 and assists in raising the latter into the field. As soon as the bar, 6 reaches its upward limit of movementit engages an arm, 26, on the lever 15. This throws the lever into normal position breaking the contact between the points, 17 and 18. As soon as the lever 15 is thrown back, the lever, 21 raises and locks it in normal or retracted position until the bar, 6 again descends. Each time that the bar, 6, is raised, the loop, 8 is moved a few teeth higher on the wheel, 1 f and it is obvious that the clock will continue to run indefinitely as long as thedevice is supplied with a suitable electric current for energizing the magnet, 3. If desired a cover .27 may be provided for boxing in the mechanism.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a device of the class described, an

electro-magnet, in combination with a barv limit of movement forenergizing said magnet and when, at its upper limit 0 movement for deene .said magnet, and asecond bar pivote adjacent to the first said bar and ted to assist in bringing said bar further into the magnetic field, substantially as described.

2. In a device o'f the class described, an

electro-magnet, in combination .with a bar pf'votall mounted beneath said magnet, means or connect' the free ends of said bar with the teeth 0 one of thevwheels of a clock, a circuit closing lever pivoted adj acent,

to said bar and adapted in one position to close the circuit to said magnet and when in retracted position to break the circuit, a second lever pivotally mounted beneath said bar and having a pin adapted to engage said circuit closin lever to hold the same in retracted position, said pin extendin into the path'of said bar and adapted to e disenglaged from the circuit closing lever by the ownward movement of said bar and an arm lower limit of movement and for den'ergizing said magnet when it reaches its upper limit of movement, and an adjustable member for connecting the free end of said bar with one of the wheels of the clock, substantially as described.

111 testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

l)OMINI( SANDRETTO.

Witnesses:

PETER GRIVETTO, DOMENICO GALL0. 

